Building modern web applications often means choosing between two extremes: server-rendered templates with limited interactivity, or a fully decoupled SPA that requires maintaining a separate API layer. Traditional templating engines also make it harder to build reusable, component-based UIs, something React and Vue excel at. Cross Inertia offers a third path.

In this talk, we’ll explore Cross Inertia, a Python implementation of the Inertia.js protocol that lets you build React (or Vue) frontends while keeping the simplicity of traditional server-side routing and controllers. You get the power of component-based architecture with the ergonomics of server-rendered apps, no REST API to design, no client-side router to configure, no state management headaches.

We’ll cover:

• What the Inertia.js protocol is and how it bridges server and client
• Setting up Cross Inertia with Django and FastAPI
• Passing data from your Python views directly to React components
• Handling forms and validation seamlessly
• A live demo building a small CRUD app

By the end, you’ll understand when Cross Inertia is a good fit for your projects and have the knowledge to start building full-stack Python apps with modern, reactive, component-based frontends without the complexity of a traditional SPA architecture.